CN1867882A - Patterned conductor touch screen having improved optics - Google Patents
Patterned conductor touch screen having improved optics Download PDFInfo
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- CN1867882A CN1867882A CNA200480030475XA CN200480030475A CN1867882A CN 1867882 A CN1867882 A CN 1867882A CN A200480030475X A CNA200480030475X A CN A200480030475XA CN 200480030475 A CN200480030475 A CN 200480030475A CN 1867882 A CN1867882 A CN 1867882A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/204—Filters in which spectral selection is performed by means of a conductive grid or array, e.g. frequency selective surfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- Position Input By Displaying (AREA)
- Non-Insulated Conductors (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
The present invention provides a touch screen that includes a pattern of transparent conductors as touch sensing elements, and that has a layered construction configured to reduce the visibility of the transparent conductor pattern. The construction includes a coating covering a substrate, the transparent conductor pattern disposed on the coating, and a filler material covering and contacting the transparent conductor pattern and the areas of the coating not covered by the transparent conductor pattern, where the index of refraction of the filler material is less than the index of refraction of the substrate and less than the index of refraction of the transparent conductor pattern.
Description
Technical field
The present invention relates to touch-screen, particularly use the touch-screen of using in the demonstration of transparent conductor pattern as the sensing contact element.
Background technology
For the user, touch-screen has become and interactional common day by day mode intuitively takes place electronic system (typically be those and contain the display that is useful on viewing information).Touch-screen comprises transparent touch-sensitive panel, and transparent touch-sensitive panel can be arranged on variable demonstration (variable display) and/or the still image, thereby can watch the information and the image of demonstration by touch-screen.Wherein, can comprise resistance-type, condenser type, projection type capacitance and surface acoustic wave with the touch screen technology that this structure uses.Many projection type capacitance touch-screens use conductive pattern as sensing element.Term " projection type capacitance " is meant that conductive pattern can be by thick relatively dielectric (as thin face glass, wear gloves on the finger of glove etc.) with a zone projection.Because the projection type capacitance touch-screen can be by the induction of thicker material, this touch-screen can durable and anti-infringement, can be applicable to very that therefore public access uses and extreme environment.
Summary of the invention
In one aspect, the invention provides a kind of structure of touch-screen, it comprises substrate, basically the coating of covered substrate, be arranged in the transparent conductor pattern on the coating, this pattern leaves the coating area that is not capped, and packing material, the coating area that this packing material covers and contacts transparent conductor pattern and do not covered by transparent conductor pattern.The refractive index of coating (refractive index) is less than the refractive index of substrate, and less than the refractive index of transparent conductor pattern.Optional layout second substrate on packing material.
The present invention also provides a kind of touch-screen structure, and it comprises: the transparent conductor pattern on the substrate; Basically covered substrate and be arranged in transparent conductor and substrate between ground floor, this ground floor is set to, and in the zone that is covered by transparent conductor, the visible transmission by this touch-screen structure is increased; And the second layer, this second layer is arranged in the zone that is covered by transparent conductor and contacts transparent conductor, and in the zone that is not covered, contact ground floor by transparent conductor, and this second layer is set to, and substance is suppressed at the visible light reflection at the contact interface place between the ground floor and the second layer.
The method that the present invention also provides a kind of visibility that is used for making touch-screen to form the transparent conductor of pattern to reduce.This method is included in substrate and forms between the transparent conductor of pattern and applies primer, makes primer covered substrate basically, and the refractive index of primer is less than the refractive index of substrate and less than the refractive index of the transparent conductor that forms pattern.The transparent conductor that forms pattern leaves the primer zone that is not capped.This method also is not included on the transparent conductor that forms pattern and the primer zone that is capped and arranges packing material, selects the refractive index and the thickness of packing material, to reduce the boundary reflection of visible light in the zone that the transparent conductor that forms pattern covers.
The foregoing invention general introduction also is not intended to description each disclosed embodiment of the present invention or each form of implementation.Accompanying drawing hereinafter will more specifically be illustrated embodiment with detailed description.
Description of drawings
With reference to accompanying drawing, in conjunction with the detailed description of following various embodiments of the present invention, can understand the present invention more completely, wherein:
Fig. 1 is the schematic side elevation of touch-screen structure of the present invention;
Fig. 2 is the schematic side elevation of touch-screen structure of the present invention;
Fig. 3 is for using the signal shape planimetric map of transparent conductor pattern as the touch-screen structure of sensing element;
Fig. 4 is the schematic side elevation of touch-screen structure of the present invention;
Fig. 5 is the schematic side elevation of touch-screen structure of the present invention;
Fig. 6 is the schematic side elevation of touch-screen structure of the present invention; And
Fig. 7 is the schematic side elevation of touch-screen system.
Although the present invention has multiple modification and optional form, represented its feature in the accompanying drawings by way of example, and will be described in more detail.Yet, should be appreciated that the present invention is not limited to described specific embodiment.On the contrary, the present invention includes all modifications, equivalent and the substitute mode of the spirit and scope of the invention that falls into the claim qualification.
Embodiment
The present invention relates to touch-screen, particularly use the touch-screen of transparent conductor pattern as sensing element, more specifically, relate to such touch-screen, this touch-screen visible light transmissive makes and can watch image by touch-screen (for example touch-screen on the display).Many touch-screens adopt transparent conductors as sensing element, and these elements can be used as continuous coated or provide with the form of pattern (as discontinuous band, line, fritter etc.).The optical property that transparent conductor has usually can cause reflection (for example because the refractive index difference between transparent conductor and the following substrate), low transmission (for example because the absorption and the reflection of light) and colour developing (for example because the preferential absorption in the particular range of wavelengths of visible spectrum) thereof.When the form that provides of transparent conductor is single when continuous coated, if this coating homogeneous relatively in the visible area scope of device, then this optical effect may be not obvious.In the device that uses transparent conductor pattern, might tell by the zone of pattern covers with not by the zone of pattern covers owing to the difference of optical effect.The notice of this possibility dispersion user, and in some applications, consider not wish to occur from aesthetics.For example, in such environment, device may be exposed under the higher environment light condition, even when display is below closed, does not also wish to see the transparent conductor pattern of contact-sensing apparatus.
The invention provides the touch-screen structure that comprises transparent conductor pattern, and this touch-screen structure is provided so that transparent conductor pattern has lower visual discrimination.Touch-screen structure of the present invention can increase transmittance and reduce the light reflection in the zone that is covered by transparent conductor pattern, thereby reduces the visibility of pattern.In structure of the present invention, touch screen base plate comprises the coating of covered substrate, and the refractive index of this coating is lower than the refractive index of substrate.On this low refractive index coating, arrange transparent conductor pattern then.The refractive index of transparent conductor pattern also is higher than the refractive index of coating.Though do not wish to be bound by any theory, but in the scope of the optical thickness sd so of transparent conductor layer and coating, make they and substrate form the antireflection lamination, the effect of antireflection lamination is, light wave destructive interference by reflecting at the interface at substrate/coating and coating/transparent conductor reduces visible reflection of light.This has increased light (for example from the light that is positioned at the display behind the touch-screen) transmission again and has passed touch-screen, and reduce the reflection of light from touch-screen the place ahead.Like this, transparent conductor pattern has reduced optical effect generally, thereby makes pattern and not lower by the distinguishing between the zone of pattern covers, thereby and has a less visibility.In addition, the overall brightness of display and contrast can be improved owing to transmission increase and external reflection reduce.
Structure of the present invention also comprises a kind of material that is arranged on the transparent conductor pattern and covers basically transparent conductor pattern, makes this material contact with below coating in the zone that is not covered by transparent conductor.Like this, this material is filled the gap between transparent conductor pattern each several part, and to make not by the interface in the zone of pattern covers be the below coating and be arranged in interface between the material on the pattern, rather than the interface between air and the below coating.Air interface can produce higher relatively refringence, can cause undesirable high boundary reflection, thereby, for example because reflection of ambient light reduces the contrast that transmittance is passed touch-screen and/or reduced the image of seeing by touch-screen.The packing material that is arranged on the transparent conductor pattern is selected, reducing between substrates coatings and packing material reflection at the interface, passed touch-screen thereby be increased in not in the zone that is covered by transparent conductor transmittance.The material that is arranged on the transparent conductor pattern can be any suitable light transmitting material that comprises binder material.Binder material can be used for the touch-screen structure is combined with other substrate, combines with display device, or combines with object that the touch-screen structure was installed or encapsulated in other being suitable for.
In structure of the present invention, this structure comprise coating, the transparent conductor pattern on the coating on substrate, the substrate and be arranged on the transparent conductor pattern and the filling pattern each several part between the packing material in gap, for each corresponding element, exemplary material selects to have following refractive index: about 1.6 to 1.7 (for example the polyethylene terephthalate substrate is about 1.67) of substrate refractive index; About 1.4 to 1.5 (for example silica dioxide coating is about 1.45) of coating refractive index; The transparent conductor refractive index is about 1.8 to 2.1 (for example tin indium oxide is about 2.0); And the packing material refractive index is about 1.4 to 1.8 (for example about 1.7).
The present invention is particularly suitable for comprising the touch-screen structure of plastic base such as polyester (as polyethylene terephthalate (PET)).Compare as substrate with using glass, when using PET or other soft plastic film as substrate, the phenomenon that the inventor observes visible transparent conductor pattern is more obvious.When making substrate with glass, the ITO pattern is annealed under the temperature between 300 ℃ to 400 ℃ usually.When PET or other temperature-sensitive material during as substrate, the ITO pattern can not so processed under the high temperature.As a result, and compare at the ITO of formation on glass and annealing pattern, the ITO pattern on the PET may need to make thicker, to reach required sheet resistance and homogeneity.This can cause the more obvious transparent conductor pattern of visibility.The inventor is also noted that can be by arranging that monox is (as SiO between pet substrate and ITO pattern
2) coating, improve the resistance homogeneity of the ITO pattern on the pet substrate.
Can understand many aspects of the present invention with reference to the accompanying drawings, illustrate by way of example simultaneously and the embodiment described is illustrative, be not to be detailed description to whole protection domains.
Fig. 1 illustrates touch-screen structure 100 of the present invention, it comprises substrate 110, the coating 120 of covered substrate 110, be arranged in the transparent conductor layer 130 of the formation pattern on the coating 120, with the packing material 140 that is arranged on the transparent conductor pattern 130, packing material 140 contacts with the regional interior coating 120 that is not covered by transparent conductor material.Touch-screen structure 100 can be used for user's activation type contact input equipment that transparent conductor pattern 130 provides the sensing contact element.
The surface 112 of substrate or the surface 142 of packing material can provide touch-surface.Perhaps, can be between user and substrate 110 or packing material 142 the one or more extra plays of optional layout, be used to provide touch-surface.For example,, then can provide and to remove and interchangeable overlayer, make the touch-screen touch-surface can be " renewable " if touch-surface is scratched or is damaged.As another example, particularly when substrate 110 is plastic base, can arrange on the surface 112 of substrate 110 that hardcoat is to provide touch-surface.As another example, can with have the sheet material lamination of the glass of required durability or other performance or other material or be attached to substrate 110 or packing material 140 on, between can be furnished with other structure or functional layer, also can not arrange other structure or functional layer.
Touch-screen structure 100 preferred transmission visible lights make and can watch demonstration, pattern or out of Memory or mark by touch-screen.So, the preferred transmissive visible light of the parts of each shown in Fig. 1.
In exemplary structure, substrate 110 is PET film (refractive index about 1.67); Coating 120 is monox such as SiO
2Coating (refractive index about 1.45), its thickness are about 15 to 70 nanometers, preferred 25 nanometers; Transparent conductor 130 is ITO (refractive index about 2.0), about 20 to 35 nanometers of its thickness.
Fig. 2 illustrates and similar touch-screen structure 200 shown in Figure 1, and structure 200 comprises second substrate in addition.Touch-screen structure 200 comprises: first substrate 210; Cover the coating 220 of first substrate 210; Be arranged in the transparent conductor pattern 230 on the coating 220; Packing material 240, it covers transparent conductor pattern 230, and contacts with coating 220 in the zone that is not covered by pattern 230; And be arranged in second substrate 250 on the packing material 240.Can be arranged in cementing agent between packing material 240 and the substrate 250 by use, substrate 250 is attached on the structure 200.Perhaps, packing material 240 self can be binder material, and it can be used for substrate 250 is attached on the structure 200.At packing layer 240 is in the embodiment of cementing agent, can use any suitable cementing agent, and it can be arranged on transparent conductor pattern 230 and the coating 220, makes cementing agent contact with transparent conductor pattern 230, and contacts with the unmasked portion of coating 220.Exemplary cementing agent comprises pressure sensitive adhesives and/or acrylic adhesive, and is preferably optically transparent.Substrate 250 can comprise glass and plastics for any suitable material, and can be rigidity or flexible.
The transparent conductor pattern 130 of structure 100 and the transparent conductor pattern 230 of structure 200 can form the sensing element of touch-screen.When conduction contact object (as user's finger) close enough, conduction contact object can with the one or more sensing element capacitive coupling that constitute transparent conductor pattern.In many cases, transparent conductor pattern comprises line, band, fritter, trace of a series of independently addressable electrically conducting transparents etc.Electronic controller drives each in these patterns, makes to produce detectable signal with the capacitive coupling that contacts object.From the intensity of signal, can determine that the transparent conductor pattern of which part or those parts is carrying out capacitive coupling, thus the identification touch location.
Fig. 3 illustrates an embodiment of touch-screen 300, and it comprises a plurality of parallel electrically conducting transparent bars 330 that are arranged on the substrate 310.On first end 370A and the second end 370B, each bar 330 can be connected with 380B with lead-in wire 380A respectively.Each band these lead-in wires is set, so that can be discerned separately.Lead-in wire can concentrate in together along the edge of touch-screen 300 becomes group 360, and group 360 can be connected to the buttock line (not shown) and be used for touch-screen and the electric coupling of electronic controller (not shown).The example of this touch-screen is disclosed in United States Patent (USP) 5,650,597, U.S. Patent Publication 2003/0103043, and U.S. Patent application 10/176564,10/324728 and 10/201400, and above-mentioned document is incorporated this paper into as a reference in full.Can determine touch location like this: in Y direction, by showing the bar of highest signal (, passing through interpolation method) with other if desired position precision; And, in X-direction, by relatively passing through the amount of the electric current of this each end.Such touch-screen can be available from 3M Touch Systems, Inc., and commodity are called Near Field Imaging.
Fig. 4 illustrates another touch-screen structure 400 of the present invention, and it comprises first substrate 410, first coating 420 of covered substrate 410 basically, and be arranged in the first parallel electrically conducting transparent trace series 430 on first coating 420.Touch-screen 400 also comprises: second substrate 415, and it is covered by second coating 425 basically; And the second electrically conducting transparent trace series 435, be arranged on second coating 425, and be oriented to perpendicular to the first electrically conducting transparent trace series 430.Packing material 440 is arranged between first electrically conducting transparent trace series, the 430 and second electrically conducting transparent trace series 435, and contacts with second coating 425 with first coating 420 in the zone that is not covered by the electrically conducting transparent trace.Packing material 440 is preferably bonding agent, so that first substrate 410, first coating 420 and first pattern 430 are attached on second substrate 415, second coating 425 and second pattern 435.The refractive index of first coating 420 is less than the refractive index of first substrate 410 and the first electrically conducting transparent trace series 430.Similarly, the refractive index of second coating 425 is less than the refractive index of first substrate 415 and the first electrically conducting transparent trace series 435.
In operating process, can be by first substrate 410 or by second substrate 415, make in conduction contact object and the first conductive trace series 430 at least one and with the second electrically conducting transparent trace series at least one capacitive coupling, with x-coordinate and the y-coordinate of determining that contact is imported.This class touch-screen can be described as the matrix type touch-screen.The example of matrix type touch-screen is disclosed in United States Patent (USP) 6,188, and 391,5,844,506 and 5,386,219, and among international open WO 01/27868, WO 02/100074 and the WO 01/52416.
Fig. 5 illustrates the example according to another matrix type touch-screen of the present invention.Touch-screen structure 500 comprises substrate 510, and a surface of substrate 510 is covered by first coating 520 substantially, and the apparent surface is covered by second coating 525 substantially.The first electrically conducting transparent trace series 530 is arranged on first coating 520, and the second electrically conducting transparent trace series 535 is arranged on second coating 525 and is oriented to perpendicular to the first electrically conducting transparent trace series.Thus, same substrate 510 has coating and transparent conductor pattern on two apparent surfaces.Packing material 540 (preferred binder) is arranged on the electrically conducting transparent trace 530, and its arrangement is to make packing material cover electrically conducting transparent trace 530 and do not contact with coating 520 in the zone that is covered by electrically conducting transparent trace 530.Can on packing layer 540, arrange optional top substrate 550, and can use independent adhesive layer or pass through packing layer 540 (if himself is cementing agent), top substrate 550 is attached on the structure 500.If desired, can on electrically conducting transparent trace 535, arrange optional cementing agent or other packing layer 545, and, can optionally arrange optional substrate 555 on the packing layer 545.
Fig. 6 illustrates according to another touch-screen of the present invention.Touch-screen 600 comprises touch-screen structure 670, and by adhesive layer 680, touch-screen structure 670 is attached on the supporting substrate 690.Touch-screen structure 670 comprises first substrate 615 that scribbles first coating 625, be arranged in first transparent conductor pattern 635 on first coating 625, with packing material 645, packing material 645 is arranged on first transparent conductor pattern 635, and the gap between a plurality of parts of filling pattern 635, with contact coating 625.Touch-screen structure 670 also comprises second substrate 610 that scribbles second coating 620, be arranged in second transparent conductor pattern 630 on second coating 620, with second packing material 640, second packing material 640 is arranged on second transparent conductor pattern 630, and the gap between a plurality of parts of filling pattern 630, with contact coating 620.Structure 670 also comprises the top substrate 650 with hardcoat layer 660, thinks that structure 670 provides touch-surface.Preferred packing material 640 and 645 is a binder material, so that the adjacent elements in this structure is combined.Perhaps, can use independent adhesive layer (not shown).
Supporting substrate 690 can be suitable substrate arbitrarily, comprises rigidity or flexible material, for example glass or plastics.In exemplary embodiment, supporting substrate 690 is the glass substrate of rigidity, and substrate 610,615 and 650 is flexible plastic base.By this way, can use volume to volume method (roll-to-roll) or other suitable job operation, on each flexible base, board 610,615 and 650, make the sub-structure of structure 670.Can or bond together each sub-structure lamination then and form structure 670, again structure 670 is attached on the supporting substrate 690.
Fig. 7 illustrates touch-screen system 700 with illustrating shape, and it comprises according to touch-screen 710 of the present invention, and touch-screen 710 is arranged as near display element 720, makes and can watch display element 720 by touch-screen 710.Touch-screen 710 can be used as input media, with display element 720 on the information that shows interact.Display element 720 can be the electronic console of display message (as literal or pattern) changeably.Display element 720 also can comprise static information such as printed patterns, literal or other mark.Display element 720 can show associating with the electronics with static pattern, static pattern be for example for can be printed onto or directly be arranged in the form of the display screen icon on the display screen, perhaps is arranged at independent being arranged to and is used for the sheet material seen by touch-screen 710.Pattern, feature or other mark also can be arranged at the front portion of touch-screen 710.
Make near field imaging touch sensor structure by following treatment step.
With SiO
2Sputter is coated on the PET sheet of 7 mils (about 0.2 millimeter), forms the SiO of 250 dusts that cover pet substrate basically
2Coating.Pet substrate carries out the standard P ET film of printing treatment in advance as a surface.SiO
2Be coated on the side of not carrying out printing treatment.SiO
2The refractive index of coating is about 1.46.
In the zone that transparent conductor pattern is not set, (for example be provided with between the zone and border area of pattern), at SiO
2The top, the removable water-soluble pattern printing ink of serigraphy.
The ITO sputter is coated to SiO
2On the water-based ink of serigraphy, coating thickness enough reaches the resistance coefficient of 450 ohm/unit area (square resistance).Can use metal or pottery sputtering target, and in very wide temperature and processing window, ITO be carried out suitably sputter apply.
Water is removed pattern printing ink, dry sample, and formation is as the pattern of the ITO bar of the transparent conductor pattern of sensing electrode.
The silver electrically conductive ink is screen printed to ITO and SiO
2On, and to be dried to thickness be about 0.3 to 0.6 mil (about 8 to 15 microns), forms the conductive trace that is connected to each ITO bar.
Solvent basic ring epoxy resins dielectric ink is screen printed on the silver-colored electrically conductive ink, and carries out heat curing, reserves to be used for the through hole that is electrically connected with buttock line in epoxy resin.It is two-layer to obtain to repeat this print steps.
Silver electrically conductive ink trace is screen printed on the insulator that produces and is dried to thickness is 0.3 to 0.6 mil (about 8 to 15 microns), connects to form via through hole.
Carbonaceous conductive printing ink is screen printed on the silver-colored printing ink on the tail ends, and is dried to the thickness (about 8 to 15 microns) of 0.3 to 0.6 mil, avoids corroding and wearing and tearing with the protection trace.
1.42 the PET film of mil (about 0.036 millimeter) is coated with the thick optics acrylic compounds pressure sensitive adhesives layer of 0.5 mil (about 13 microns), and cementing agent one side down volume to volume be laminated on the sample, expose buttock line.
The one PET film is applied ITO through a side of printing treatment by sputter, and coating thickness is enough to reach the resistance coefficient of about 150 ohm/unit area, and this ITO forms the screen layer of contact-sensing apparatus.
The silver electrically conductive ink carries out serigraphy around the periphery of ITO screen layer and buttock line, and is dried to about 0.3 to 0.6 mil of thickness (about 8 to 15 microns millimeters) and is used for being electrically connected with screen layer.
On the silver-colored electrically conductive ink on the screen layer, solvent basic ring epoxy resins dielectric ink is carried out serigraphy and heat curing.
The silver electrically conductive ink carries out serigraphy around the periphery of the second lamination PET film, forms the top sheath.The silver ink setting is to about 0.3 to 0.6 mil of thickness (about 8 to 15 microns millimeters).
Solvent basic ring epoxy resins dielectric ink is carried out serigraphy and heat curing at the top sheath.
With the PET pellicular cascade of the thick acrylic compounds hard coating of 7 mils (about 0.18 millimeter) is sandwich construction, it contains acrylic compounds optical grade pressure sensitive adhesives (0.8 mil (0.02 millimeter) cementing agent/0.92 mil (0.023 millimeter) PET/0.8 mil (0.02 millimeter) cementing agent), is laminated to then on the top sheath of this structure.
The structure (0.8 mil (0.02 millimeter) cementing agent/0.92 mil (0.023 millimeter) PET/0.8 mil (0.02 millimeter) cementing agent) of acrylic compounds optical bond/PET/ acrylic compounds optical grade cementing agent is laminated to by on the sheath with release liner.
The end face of structure is carried out mask process with tygon/cementing agent mask material, this structure is cut into slices, be die-cut to parts then.
The component layer that cross cutting is good is pressed onto on the glass film plates.
The ITO bar that the parts that obtain have is difficult to by reflected light or transmitted light in sight, and the ITO bar is set for the connection electronic controller, and this electronic controller is used for the position that sensing capacitance is coupled to the conduction contactant of ITO bar.
Use optical model, relatively to be used for transmission in structure of the present invention and other same configuration thing visible light of (between substrate and transparent conductor, not comprising low refractive index coating).Also each structure and corresponding contrast thereof are compared with structure and the similar contrast structure that does not contain transparent conductor layer.Each structure and contrast difference between the transmission of structure is accordingly expressed the zone that covered by transparent conductor pattern for the resolution in the zone that is not covered by transparent conductor pattern level relatively in the structure of being discussed.Following structure is estimated, the layer of each structure is listed in regular turn.
Structure 1:
1.67 index layer (simulation pet substrate)
1.46 index layers of 30 nanometer thickness (simulation monox)
2.0 index layers (Simulation with I TO) of 20 nanometer thickness
1.46 index layers of 30 nanometer thickness (simulation monox)
1.5 index layer (simulated optical cementing agent)
Contrast structure C1 (identical with structure 1, but between substrate and ITO, do not have coating):
1.67 index layer (simulation pet substrate)
2.0 index layers (Simulation with I TO) of 20 nanometer thickness
1.46 index layers of 30 nanometer thickness (simulation monox)
1.5 index layer (simulated optical cementing agent)
Contrast structure X1:
1.67 index layer (simulation pet substrate)
1.46 index layers of 30 nanometer thickness (simulation monox)
1.5 index layer (simulated optical cementing agent)
Structure 2:
1.67 index layer (simulation pet substrate)
1.46 index layers of 30 nanometer thickness (simulation monox)
2.0 index layers (Simulation with I TO) of 20 nanometer thickness
1.5 index layer (simulated optical cementing agent)
Contrast structure C2 (identical with structure 2, but between substrate and ITO, do not have coating):
1.67 index layer (simulation pet substrate)
2.0 index layers (Simulation with I TO) of 20 nanometer thickness
1.5 index layer (simulated optical cementing agent)
Contrast structure X2:
1.67 index layer (simulation pet substrate)
1.5 index layer (simulated optical cementing agent)
Use SCI Film Wizard optical model software, simulate the interior transmission of visible light (wavelength 400 nanometers are to 700 nanometers) of each above-mentioned structure.The result at three wavelength places in limit of visible spectrum provides in table 1.Δ is represented the structure of appointment and is contrasted difference between the transmission of structure accordingly.
Table 1: the internal transmission of various structures
| Structure | ％T@400nm | Δ | ％T@550nm | Δ | ％T@700nm | Δ |
| 1 | 89 | 0.9 | 89.8 | 0.1 | 90 | 0.1 |
| C1 | 88.5 | 1.4 | 89.2 | 0.7 | 89.4 | 0.5 |
| X1 | 89.9 | 89.9 | 89.90 | |||
| 2 | 88.9 | 1.0 | 89.7 | 0.2 | 90 | 0.1 |
| C2 | 88.5 | 1.4 | 89.2 | 0.7 | 89.4 | 0.5 |
| X2 | 89.9 | 89.9 | 89.9 | |||
Model test result shows that in the zone that is covered by transparent conductor pattern, structure of the present invention shows the increase transmission in whole limit of visible spectrum.Model test result also shows, compare with structure with the identical contrast that does not comprise low refractive index coating between substrate and the transparent conductor pattern, the transmission difference of structure of the present invention between zone that is covered by transparent conductor and the zone that do not covered by transparent conductor is less.This transmission difference between overlay area and uncovered area reduces to cause the lower transparent conductor pattern of acquisition vision addressability.
Compared the Δ of two kinds of structures 1 and 2 and the contrast Δ with structure C2, contrast can be represented with structure C2 and be usually used in the described known touch screens structure that is positioned on the flexible base, board also enlighteningly.Because two kinds of contrast structure X1 and X2 are identical aspect the optical property, so Δ can directly compare.This comparison shows that, when comparing with structure C2 with contrast, in the ITO overlay area, two structures 1 and structure 2 show the transmission of improvement in whole limit of visible spectrum, structure 1 shows the transmission of the slight improvement that is better than structure 2 in the part visible spectrum, wherein, structure 1 comprises silicon oxide layer in the ITO above and below, and structure 2 only comprises silicon oxide layer below ITO.
The present invention should not be considered as being confined to above-mentioned specific embodiment, is proposed by claims and be construed as four corner of the present invention.According to above instruction, those skilled in the art can easily draw and can use various modification of the present invention, equivalent method and multiple structure.
Claims (37)
1. touch-screen comprises:
Substrate;
Basically cover the coating of described substrate;
Be arranged in the transparent conductor pattern on the described coating, described pattern leaves the coating area that is not capped; And
Packing material, the coating area that this packing material covers and contacts described transparent conductor pattern and do not covered by transparent conductor pattern;
The refractive index of wherein said coating is less than the refractive index of described substrate, and less than the refractive index of described transparent conductor pattern.
2. touch-screen according to claim 1, the refractive index of wherein said packing material is identical with the refractive index of described coating or approaching.
3. touch-screen according to claim 1, wherein said packing material is identical with the material of described coating.
4. touch-screen according to claim 1, wherein said packing material comprises monox.
5. touch-screen according to claim 1, wherein said packing material are cementing agent.
6. touch-screen according to claim 1, wherein said substrate comprises plastics.
7. touch-screen according to claim 1, wherein said substrate comprises polyester.
8. touch-screen according to claim 1, wherein said substrate comprise be arranged in described coating facing surfaces on hard conating.
9. touch-screen according to claim 1, wherein said coating comprises monox.
10. touch-screen according to claim 1, wherein said transparent conductor pattern comprises transparent conductive oxide.
11. touch-screen according to claim 1, wherein said transparent conductor pattern comprises tin indium oxide.
12. touch-screen according to claim 1, wherein said transparent conductor pattern comprises conducting polymer.
13. touch-screen according to claim 1, the refractive index of wherein said substrate is about 1.6 to 1.7, the refractive index of described transparent conductor pattern is about 1.8 to 2.1, and the refractive index of described coating is about 1.4 to 1.5, and the refractive index of described packing material is about 1.4 to 1.8.
14. touch-screen according to claim 1 further comprises second substrate that is arranged on the described packing material.
15. touch-screen according to claim 14, wherein said second substrate comprises glass.
16. touch-screen according to claim 14, wherein said second substrate comprises plastics.
17. touch-screen according to claim 14, wherein said second substrate comprises polyester.
18. touch-screen according to claim 14, wherein said second substrate is by cementing agent and described Touch Screen.
19. touch-screen according to claim 18, wherein said cementing agent are described packing material.
20. touch-screen according to claim 1 is wherein selected the thickness of described coating, reduces so that the visible reflection of light in the zone that is covered by transparent conductor pattern is substantive.
21. touch-screen according to claim 1, wherein said transparent conductor pattern comprise a plurality of parallel bands.
22. touch-screen according to claim 1, wherein said transparent conductor pattern are set to be used to be connected to electronic controller, when a part of capacitive coupling of conduction contactant and pattern, this electronic controller is suitable for determining touch location by the signal that is produced.
23. touch-screen according to claim 22, it is arranged as, and makes described contactant by described substrate and described transparent conductor pattern capacitive coupling.
24. touch-screen according to claim 22, it is arranged as, and makes described contactant by described packing material and described transparent conductor pattern capacitive coupling.
25. touch-screen according to claim 22, it is arranged as, and makes described contactant by being arranged in second substrate on the described packing material, with described transparent conductor pattern capacitive coupling.
26. touch-screen according to claim 1, it is set to be arranged in electronics and shows the top, thereby can watch described demonstration by described touch-screen.
27. touch-screen according to claim 1 further comprises: second substrate; Basically cover second coating of described second substrate; Second transparent conductor pattern, it is arranged on described second coating, and leaves not by second coating area of pattern covers; And second packing material, described second coating area that covers and contact described second transparent conductor pattern and do not covered by transparent conductor pattern.
28. a touch-screen structure comprises:
Pet substrate;
Cover the silicon oxide layer of described pet substrate;
Be arranged in the parallel ITO strip array on the described silicon oxide layer; And
Be arranged on the described ITO bar and with the optical clear pressure sensitive adhesives of its covering, the refractive index of described optical clear pressure sensitive adhesives is 1.4 to 1.8.
29. touch-screen structure according to claim 28, it is attached on described second substrate by the optical clear cementing agent.
30. touch-screen structure according to claim 29, wherein said second substrate comprises plastics.
31. touch-screen structure according to claim 29, wherein said second substrate comprises glass.
32. a touch-screen comprises:
The touch-screen structure, this touch-screen structure comprises:
On substrate, form the transparent conductor of pattern;
Basically covered substrate and be arranged in transparent conductor and substrate between ground floor, this ground floor is set to, and in the zone that is covered by transparent conductor, the visible transmission by touch-screen is increased; And
The second layer, it is arranged to contact by the transparent conductor in the transparent conductor overlay area, and contact not by the described ground floor in the transparent conductor overlay area, this second layer is set to, and is suppressed at the visible light reflection at the contact interface place between the described ground floor and the described second layer with substance.
33. touch-screen according to claim 32, wherein said touch-screen structure further comprises second substrate that is arranged on the described second layer.
34. touch-screen according to claim 32 comprises that further electronics shows, is placed as by described touch-screen structure and watches.
35. the method that the transparent conductor visibility that is used for making touch-screen to form pattern reduces comprises:
Between the transparent conductor of substrate and formation pattern, apply primer, make described primer cover described substrate basically, the refractive index of described primer is less than the refractive index of the transparent conductor of the refractive index of described substrate and described formation pattern, and the transparent conductor of wherein said formation pattern leaves the primer zone that is not capped; And
On the transparent conductor of described formation pattern and the primer zone that is not capped, arrange packing material, select the refractive index and the thickness of described packing material, so that the boundary reflection of the visible light in the zone that the transparent conductor of described formation pattern covers reduces.
36. method according to claim 35 further is included in the step of arranging second substrate on the described packing material.
37. method according to claim 35 further comprises the formation step of the transparent conductor of described formation pattern.
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|---|---|---|---|
| US10/686,141 | 2003-10-15 | ||
| US10/686,141 US8068186B2 (en) | 2003-10-15 | 2003-10-15 | Patterned conductor touch screen having improved optics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1867882A true CN1867882A (en) | 2006-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200480030475XA Pending CN1867882A (en) | 2003-10-15 | 2004-09-13 | Patterned conductor touch screen having improved optics |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8068186B2 (en) |
| EP (1) | EP1678599B1 (en) |
| JP (1) | JP2007508639A (en) |
| CN (1) | CN1867882A (en) |
| AT (1) | ATE473481T1 (en) |
| AU (1) | AU2004284746A1 (en) |
| DE (1) | DE602004028035D1 (en) |
| TW (1) | TW200527304A (en) |
| WO (1) | WO2005040901A2 (en) |
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| CN110479110A (en) * | 2014-04-15 | 2019-11-22 | 赛尔格有限责任公司 | Conductive, transparent, translucent and/or reflective material |
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| CN110479110B (en) * | 2014-04-15 | 2022-03-22 | 赛尔格有限责任公司 | Conductive, transparent, translucent and/or reflective material |
| CN106413864A (en) * | 2014-04-15 | 2017-02-15 | 赛尔格有限责任公司 | Electrically conductive, transparent, translucent, and/or reflective materials |
| CN104090675A (en) * | 2014-06-16 | 2014-10-08 | 信利半导体有限公司 | Touch panel sensor and touch panel |
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| US10976883B2 (en) | 2017-01-09 | 2021-04-13 | Chengdu Boe Optelectronics Technology Co., Ltd. | Touch substrate and touch display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007508639A (en) | 2007-04-05 |
| WO2005040901A2 (en) | 2005-05-06 |
| ATE473481T1 (en) | 2010-07-15 |
| US8068186B2 (en) | 2011-11-29 |
| US20050083307A1 (en) | 2005-04-21 |
| EP1678599A2 (en) | 2006-07-12 |
| WO2005040901A3 (en) | 2005-08-18 |
| TW200527304A (en) | 2005-08-16 |
| DE602004028035D1 (en) | 2010-08-19 |
| EP1678599B1 (en) | 2010-07-07 |
| AU2004284746A1 (en) | 2005-05-06 |
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